Fix some documentation gitches.

Fix an uninitialized variable.
Add builtin rules for Objective C.
Add a new debug line that shows where the commands that are about to be run
were defined.

6 files changed, 76 insertions, 46 deletions

diff --git a/ChangeLog b/ChangeLog
index 8b68779..8575690 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2007-05-11  Paul Smith  <psmith@gnu.org>
+
+	* job.c (new_job): Add debug info to specify where make found the
+	command script it is running to build a target.
+	Fixes Savannah bug #18617.
+
+	* default.c (default_suffixes,default_suffix_rules,default_variables):
+	Add support for Objective C.  Fixes Savannah bug #16389.
+	Based on a patch provided by Peter O'Gorman <peter@pogma.com>.
+
+	* function.c (func_lastword): Initialize p.
+
+	* doc/make.texi (Eval Function, Implicit Variables, Special Targets):
+	Doc fixes noticed by Bob <twobanjobob@sbcglobal.net>.  Patch from
+	Dave Korn <dave.korn@artimi.com>
+
 2007-05-08  Paul Smith  <psmith@gnu.org>
 
 	Fix Savannah bug #19656:
diff --git a/default.c b/default.c
index 2d5480d..fbe6c1e 100644
--- a/default.c
+++ b/default.c
@@ -41,11 +41,11 @@ static char default_suffixes[]
 .s .ss .i .ii .mod .sym .def .h .info .dvi .tex .texinfo .texi .txinfo \
 .w .ch .cweb .web .com .sh .elc .el";
 #elif defined(__EMX__)
-  = ".out .a .ln .o .c .cc .C .cpp .p .f .F .r .y .l .s .S \
+  = ".out .a .ln .o .c .cc .C .cpp .p .f .F .m .r .y .l .ym .yl .s .S \
 .mod .sym .def .h .info .dvi .tex .texinfo .texi .txinfo \
 .w .ch .web .sh .elc .el .obj .exe .dll .lib";
 #else
-  = ".out .a .ln .o .c .cc .C .cpp .p .f .F .r .y .l .s .S \
+  = ".out .a .ln .o .c .cc .C .cpp .p .f .F .m .r .y .l .ym .yl .s .S \
 .mod .sym .def .h .info .dvi .tex .texinfo .texi .txinfo \
 .w .ch .web .sh .elc .el";
 #endif
@@ -192,6 +192,8 @@ static char *default_suffix_rules[] =
     "$(LINK.cpp) $^ $(LOADLIBES) $(LDLIBS) -o $@",
     ".f",
     "$(LINK.f) $^ $(LOADLIBES) $(LDLIBS) -o $@",
+    ".m",
+    "$(LINK.m) $^ $(LOADLIBES) $(LDLIBS) -o $@",
     ".p",
     "$(LINK.p) $^ $(LOADLIBES) $(LDLIBS) -o $@",
     ".F",
@@ -221,6 +223,8 @@ static char *default_suffix_rules[] =
     "$(COMPILE.cpp) $(OUTPUT_OPTION) $<",
     ".f.o",
     "$(COMPILE.f) $(OUTPUT_OPTION) $<",
+    ".m.o",
+    "$(COMPILE.m) $(OUTPUT_OPTION) $<",
     ".p.o",
     "$(COMPILE.p) $(OUTPUT_OPTION) $<",
     ".F.o",
@@ -249,15 +253,18 @@ static char *default_suffix_rules[] =
 #endif
     ".l.c",
     "@$(RM) $@ \n $(LEX.l) $< > $@",
+    ".ym.m",
+    "$(YACC.m) $< \n mv -f y.tab.c $@",
+    ".lm.m",
+    "@$(RM) $@ \n $(LEX.m) $< > $@",
 
     ".F.f",
     "$(PREPROCESS.F) $(OUTPUT_OPTION) $<",
     ".r.f",
     "$(PREPROCESS.r) $(OUTPUT_OPTION) $<",
 
-    /* This might actually make lex.yy.c if there's no %R%
-       directive in $*.l, but in that case why were you
-       trying to make $*.r anyway?  */
+    /* This might actually make lex.yy.c if there's no %R% directive in $*.l,
+       but in that case why were you trying to make $*.r anyway?  */
     ".l.r",
     "$(LEX.l) $< > $@ \n mv -f lex.yy.r $@",
 
@@ -398,9 +405,11 @@ static const char *default_variables[] =
 # else
     "CXX", "gcc",
 # endif /* __MSDOS__ */
+    "OBJC", "gcc",
 #else
     "CC", "cc",
     "CXX", "g++",
+    "OBJC", "cc",
 #endif
 
     /* This expands to $(CO) $(COFLAGS) $< $@ if $@ does not exist,
@@ -468,6 +477,8 @@ static const char *default_variables[] =
     "LINK.o", "$(CC) $(LDFLAGS) $(TARGET_ARCH)",
     "COMPILE.c", "$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
     "LINK.c", "$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
+    "COMPILE.m", "$(OBJC) $(OBJCFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
+    "LINK.m", "$(OBJC) $(OBJCFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
     "COMPILE.cc", "$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
     "COMPILE.C", "$(COMPILE.cc)",
     "COMPILE.cpp", "$(COMPILE.cc)",
@@ -476,6 +487,8 @@ static const char *default_variables[] =
     "LINK.cpp", "$(LINK.cc)",
     "YACC.y", "$(YACC) $(YFLAGS)",
     "LEX.l", "$(LEX) $(LFLAGS) -t",
+    "YACC.m", "$(YACC) $(YFLAGS)",
+    "LEX.m", "$(LEX) $(LFLAGS) -t",
     "COMPILE.f", "$(FC) $(FFLAGS) $(TARGET_ARCH) -c",
     "LINK.f", "$(FC) $(FFLAGS) $(LDFLAGS) $(TARGET_ARCH)",
     "COMPILE.F", "$(FC) $(FFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c",
diff --git a/doc/make.texi b/doc/make.texi
index 4680dec..baf92af 100644
--- a/doc/make.texi
+++ b/doc/make.texi
@@ -2940,10 +2940,6 @@ makefile, then all prerequisite lists defined @emph{after} it appears
 will be expanded a second time after all makefiles have been read in.
 @xref{Secondary Expansion, ,Secondary Expansion}.
 
-The prerequisites of the special target @code{.SUFFIXES} are the list
-of suffixes to be used in checking for suffix rules.
-@xref{Suffix Rules, , Old-Fashioned Suffix Rules}.
-
 @findex .DELETE_ON_ERROR
 @item .DELETE_ON_ERROR
 @cindex removing targets on failure
@@ -8390,17 +8386,18 @@ implemented in @code{make} as suffix rules, so which ones will be
 defined depends on the @dfn{suffix list} (the list of prerequisites of
 the special target @code{.SUFFIXES}).  The default suffix list is:
 @code{.out}, @code{.a}, @code{.ln}, @code{.o}, @code{.c}, @code{.cc},
-@code{.C}, @code{.cpp}, @code{.p}, @code{.f}, @code{.F}, @code{.r}, @code{.y},
-@code{.l}, @code{.s}, @code{.S}, @code{.mod}, @code{.sym}, @code{.def},
-@code{.h}, @code{.info}, @code{.dvi}, @code{.tex}, @code{.texinfo},
-@code{.texi}, @code{.txinfo}, @code{.w}, @code{.ch} @code{.web},
-@code{.sh}, @code{.elc}, @code{.el}.  All of the implicit rules
-described below whose prerequisites have one of these suffixes are
-actually suffix rules.  If you modify the suffix list, the only
-predefined suffix rules in effect will be those named by one or two of
-the suffixes that are on the list you specify; rules whose suffixes fail
-to be on the list are disabled.  @xref{Suffix Rules, ,Old-Fashioned
-Suffix Rules}, for full details on suffix rules.
+@code{.C}, @code{.cpp}, @code{.p}, @code{.f}, @code{.F}, @code{.m},
+@code{.r}, @code{.y}, @code{.l}, @code{.ym}, @code{.lm}, @code{.s},
+@code{.S}, @code{.mod}, @code{.sym}, @code{.def}, @code{.h},
+@code{.info}, @code{.dvi}, @code{.tex}, @code{.texinfo}, @code{.texi},
+@code{.txinfo}, @code{.w}, @code{.ch} @code{.web}, @code{.sh},
+@code{.elc}, @code{.el}.  All of the implicit rules described below
+whose prerequisites have one of these suffixes are actually suffix
+rules.  If you modify the suffix list, the only predefined suffix
+rules in effect will be those named by one or two of the suffixes that
+are on the list you specify; rules whose suffixes fail to be on the
+list are disabled.  @xref{Suffix Rules, ,Old-Fashioned Suffix Rules},
+for full details on suffix rules.
 
 @table @asis
 @item Compiling C programs
@@ -8731,21 +8728,11 @@ Program for compiling assembly files; default @samp{as}.
 Program for compiling C programs; default @samp{cc}.
 @pindex cc
 
-@item CO
-@vindex CO
-Program for checking out files from RCS; default @samp{co}.
-@pindex cc
-
 @item CXX
 @vindex CXX
 Program for compiling C++ programs; default @samp{g++}.
 @pindex g++
 
-@item CO
-@vindex CO
-Program for extracting a file from RCS; default @samp{co}.
-@pindex co
-
 @item CPP
 @vindex CPP
 Program for running the C preprocessor, with results to standard output;
@@ -8757,6 +8744,21 @@ Program for compiling or preprocessing Fortran and Ratfor programs;
 default @samp{f77}.
 @pindex f77
 
+@item M2C
+@vindex M2C
+Program to use to compile Modula-2 source code; default @samp{m2c}.
+@pindex m2c
+
+@item PC
+@vindex PC
+Program for compiling Pascal programs; default @samp{pc}.
+@pindex pc
+
+@item CO
+@vindex CO
+Program for extracting a file from RCS; default @samp{co}.
+@pindex co
+
 @item GET
 @vindex GET
 Program for extracting a file from SCCS; default @samp{get}.
@@ -8777,16 +8779,6 @@ Program to use to turn Yacc grammars into source code; default @samp{yacc}.
 Program to use to run lint on source code; default @samp{lint}.
 @pindex lint
 
-@item M2C
-@vindex M2C
-Program to use to compile Modula-2 source code; default @samp{m2c}.
-@pindex m2c
-
-@item PC
-@vindex PC
-Program for compiling Pascal programs; default @samp{pc}.
-@pindex pc
-
 @item MAKEINFO
 @vindex MAKEINFO
 Program to convert a Texinfo source file into an Info file; default
diff --git a/function.c b/function.c
index caf87b9..e190647 100644
--- a/function.c
+++ b/function.c
@@ -693,7 +693,7 @@ func_lastword (char *o, char **argv, const char *funcname UNUSED)
 {
   unsigned int i;
   const char *words = argv[0];    /* Use a temp variable for find_next_token */
-  const char *p;
+  const char *p = NULL;
   const char *t;
 
   while ((t = find_next_token (&words, &i)))
diff --git a/job.c b/job.c
index 52af31a..a05c356 100644
--- a/job.c
+++ b/job.c
@@ -1482,10 +1482,10 @@ start_waiting_job (struct child *c)
 void
 new_job (struct file *file)
 {
-  register struct commands *cmds = file->cmds;
-  register struct child *c;
+  struct commands *cmds = file->cmds;
+  struct child *c;
   char **lines;
-  register unsigned int i;
+  unsigned int i;
 
   /* Let any previously decided-upon jobs that are waiting
      for the load to go down start before this new one.  */
@@ -1723,7 +1723,16 @@ new_job (struct file *file)
 
   /* The job is now primed.  Start it running.
      (This will notice if there are in fact no commands.)  */
-  (void) start_waiting_job (c);
+  if (cmds->fileinfo.filenm)
+    DB (DB_BASIC, (_("Invoking commands from %s:%lu to update target `%s'.\n"),
+                   cmds->fileinfo.filenm, cmds->fileinfo.lineno,
+                   c->file->name));
+  else
+    DB (DB_BASIC, (_("Invoking builtin commands to update target `%s'.\n"),
+                   c->file->name));
+
+
+  start_waiting_job (c);
 
   if (job_slots == 1 || not_parallel)
     /* Since there is only one job slot, make things run linearly.
diff --git a/remake.c b/remake.c
index ee8acf3..f494cf1 100644
--- a/remake.c
+++ b/remake.c
@@ -803,7 +803,7 @@ notice_finished_file (struct file *file)
 
   if (touch_flag
       /* The update status will be:
-	 	-1	if this target was not remade;
+		-1	if this target was not remade;
 		0	if 0 or more commands (+ or ${MAKE}) were run and won;
 		1	if some commands were run and lost.
 	 We touch the target if it has commands which either were not run